import pandas as pd
import numpy as np
from dask.array import reshape

s = pd.Series(3,index=[1,2,3])
print(s)
data={'a':1,'b':2,'c':3}
s=pd.Series(data,index=[1,2,3])
print(s)
data=np.arange(12).reshape(3,4)
df1=pd.DataFrame(data,index=['a','b','c'])
print(df1)

data = {
    "姓名": ["张三", "李四", "王五"],
    "年龄": [20, 25, 30],
    "城市": ["北京", "上海", "广州"]
}
df = pd.DataFrame(data)
print(df)
print(df.values)
print(df.columns)

